JSP 2.0 Examples - jsp:attribute and jsp:body

The new <jsp:attribute> and <jsp:body>
standard actions can be used to specify the value of any standard
action or custom action attribute.

This example uses the <jsp:attribute>
standard action to use the output of a custom action invocation
(one that simply outputs "Hello, World!") to set the value of a
bean property. This would normally require an intermediary
step, such as using JSTL's <c:set> action.